source3/smbd/smb2_glue.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "smbd/smbd.h"
  23 #include "smbd/globals.h"
  24 #include "../libcli/smb/smb_common.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_SMB2
  28
  29 struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req,
  30                                                struct files_struct *fsp)
  31 {
  32         struct smb_request *smbreq;
  33         const uint8_t *inhdr = SMBD_SMB2_IN_HDR_PTR(req);
  34
  35         if (req->smb1req) {
  36                 smbreq = req->smb1req;
  37         } else {
  38                 smbreq = talloc_zero(req, struct smb_request);
  39                 if (smbreq == NULL) {
  40                         return NULL;
  41                 }
  42         }
  43
  44         smbreq->request_time = req->request_time;
  45         if (req->session != NULL) {
  46                 smbreq->vuid = req->session->global->session_wire_id;
  47         }
  48         if (req->tcon != NULL) {
  49                 smbreq->tid = req->tcon->compat->cnum;
  50                 smbreq->conn = req->tcon->compat;
  51         }
  52         smbreq->sconn = req->sconn;
  53         smbreq->xconn = req->xconn;
  54         smbreq->session = req->session;
  55         smbreq->smbpid = (uint16_t)IVAL(inhdr, SMB2_HDR_PID);
  56         smbreq->flags2 = FLAGS2_UNICODE_STRINGS |
  57                          FLAGS2_32_BIT_ERROR_CODES |
  58                          FLAGS2_LONG_PATH_COMPONENTS |
  59                          FLAGS2_IS_LONG_NAME;
  60
  61         /* Only set FLAGS2_DFS_PATHNAMES if it's really a DFS share */
  62         if (smbreq->conn != NULL &&
  63             lp_host_msdfs() &&
  64             lp_msdfs_root(SNUM(smbreq->conn))) {
  65                 if (IVAL(inhdr, SMB2_HDR_FLAGS) & SMB2_HDR_FLAG_DFS) {
  66                         smbreq->flags2 |= FLAGS2_DFS_PATHNAMES;
  67                 }
  68         }
  69         smbreq->mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
  70         smbreq->chain_fsp = req->compat_chain_fsp;
  71         if (fsp != NULL) {
  72                 smbreq->posix_pathnames =
  73                         (fsp->fsp_name->flags & SMB_FILENAME_POSIX_PATH);
  74         }
  75         smbreq->smb2req = req;
  76         req->smb1req = smbreq;
  77
  78         return smbreq;
  79 }
  80
  81 /*********************************************************
  82  Are there unread bytes for recvfile ?
  83 *********************************************************/
  84
  85 size_t smbd_smb2_unread_bytes(struct smbd_smb2_request *req)
  86 {
  87         if (req->smb1req) {
  88                 return req->smb1req->unread_bytes;
  89         }
  90         return 0;
  91 }
  92
  93 /*********************************************************
  94  Called from file_free() to remove any chained fsp pointers.
  95 *********************************************************/
  96
  97 void remove_smb2_chained_fsp(files_struct *fsp)
  98 {
  99         struct smbd_server_connection *sconn = fsp->conn->sconn;
 100         struct smbXsrv_connection *xconn = NULL;
 101
 102         if (sconn->client != NULL) {
 103                 xconn = sconn->client->connections;
 104         }
 105
 106         for (; xconn != NULL; xconn = xconn->next) {
 107                 struct smbd_smb2_request *smb2req;
 108
 109                 for (smb2req = xconn->smb2.requests; smb2req; smb2req = smb2req->next) {
 110                         if (smb2req->compat_chain_fsp == fsp) {
 111                                 smb2req->compat_chain_fsp = NULL;
 112                         }
 113                         if (smb2req->smb1req && smb2req->smb1req->chain_fsp == fsp) {
 114                                 smb2req->smb1req->chain_fsp = NULL;
 115                         }
 116                 }
 117         }
 118 }